Metal bobbin



yarns of this character.

Patented Sept. 9, Q1952 METAL BOBBIN William H. Miller, Hazleton, Pa., assignor to Cloverleaf-Freeland Corporation, Pa., a corporation of Pennsylvania Honesdale,

Application July 12, 19 s,sei-ia1 No. 38,363 i The present-invention pertains to metal bobbins or spools of a type for use in the process ng of nylon or other yarns of high elasticity to replace conventional wooden barrel types of bob bins or spools which have been found to have inadequate. strength to withstand, without distortion, the high internal pressures to which the bobbin barrels are subjected when processing The primary object of the invention is the provision of a new and improved metal bobbin.

Another object of the invention is to provide a metallic bobbin having new and improved meansfor securing the bobbin heads to the bobbin barrel.

Another and further object of the invention is to provide an all aluminum or magnesium bobbin or spool.

Another and still further object of the invention is to provide a metallic bobbin which is simple of construction; easily and quickly assembled; cheap of manufacture yet highly eflicient and durable in use and embodying sufficient strength to withstand the pressures to which bobbin barrels are subjected when used in the processing of yarns of high elasticity.

Other objects and advantages will be recognized by those skilled in this art from the following description when read in the light of the accompanying drawings.

In the drawings:

Fig. l is an end view of a bobbin embodying the present invention.

Fig. 2 is a longitudinal sectional view of the bobbin of Fig. 1.

Fig. 3 is a view in side elevation of a bobbin embodying a modified form of the invention, a portion of the view being broken away and shown in longitudinal section.

Fig. 4. is an end view of a bobbin embodying another and further modified form of the invention.

Referring now to Figs. 1 and 2 which illustrate one embodiment of the invention, A is the bobbin barrel and is a circular open-endedmetallic tube having attached to its ends the heads B in the manner hereinafter immediately described.

Each of the barrel ends is internally threaded as at l and threadedly receives the circular disc or plate C. The heads preferably, although not necessarily, have their inner faces provided with a circular groove 2 which telescopically receive the ends of the barrel.

The plates or discs are utilized as an anchor for retaining the heads on the barrel and in the .form 9: the ii-immanen being described this is'illustrated as being accomplished in one of two different ways. One head is retained on the barrel end 'by'a plurality of rivets 3 which pass through the head and the disc. The other head is secured in position by screws 4 having their heads at the external side. of the bobbin head and having their threaded ends in threaded engagement withthe disc C as illustrated at 5.

The headssand discs are centrally provided with registering and aligned openings toreceive the gudgeons 6 each of which atlits internalend and beneath its respective disc is provided with ahead I having abutment with the inner face of its respectivedisc. A hollow tube 5 extends between the oppositely positioned gudgeons and telescopically receives the heads thereof and holds the gudgeons in the aforementioned abutting relationship with the discs.

All parts of the bobbin are composed of a metal and preferably are made of aluminum or magnesium so that the unit is quite light.

It will be apparent, and particularly so when the heads are held in place by screws, that the bobbin can be quickly and easily assembled or disassembled. This is of great advantage in reducing the cost of production and in making it possible to maintain the bobbin in service by the replacement of any worn or damaged parts.

A modified construction is illustrated in Fig. 3. In this arrangement there is the same threaded barrel A which internally and at its ends threadedly receives the discs or plates D. These plates on their outer faces and adjacent their peripheral edges are upset as at 9 to provide an upstanding circumferential ridge or web It.

The metallic heads B are provided with the aforementioned circumferential grooves 2 for the reception of the barrel ends and when positioned on the barrel the inner faces of the heads contact the outer faces of the ridges or webs throughout the circumference thereof. heads are secured to the, discs or plates D by the common and well-known projection electric weld method which weld in Fig. 3 for purposes of clearer understanding is illustrated at II.

The bobbin is provided with the same and heretofore previously described gudgeons 6 and the hollow tube 8 to provide throughout the length of the spool an open tubular passageway.

The weld accomplished by the construction described will be in the nature of what is commonly referred to as a continuous projection seam weld. should it be found desirable the outwardly projecting ridge or web could be replaced The the" scope of the hereinafter appended 3 by a series of individual spaced lugs or nodules arranged circumferentially of the discs adjacent their peripheral edges. This construction would provide a plurality of individual projection welds which would be made in .the common and wellknown manner.

A further and different manner of electrically welding the heads to the barrel is illustrated in Fig. 4 wherein insteadv of utilizing projection 01 seam welding a plurality of spot welds l2 are made between the bobbin head and the circular outwardly extending ridge or web of the retaining plate of disc D.

The particular type of weld utilized is optional but by utilizing the continuous projection. weld, first described a 360 continuous bond is'obtai-ned between the retaining plates or discs and the heads which would be found to be advantageous under numerous of the uses to which-bobbins are put.

Irrespective of the particular method of welding the heads to the retaining discs at strong and durable bobbin is" provided and one which can; be assembled with a minimum expenditure of time and laborwhich will result in reducing the cost of fabrication of the bobbin and the sales price thereof. 7

Departures can be made from the specific constructions illustrated and described without d'eparting from the inventive concept. and the inventionisaccordingly to be limited only within claim. .WhatgI claim is: I g v V In; a metallic bobbin'or: spool", an open-ended barrel", av head on and closing each barrel end, a plate secured in each barrel; end'and spaced from the head but having on its outerrface localized outwardly extending protruding means contacting the inner face of its adjacent barrel head, an electrical weld interconnecting each head and the protruding means of its adjacent plate, the

- barrel heads and their adjacent plates being provided centrally with aligned openings, a gudgeon having a central passageway disposed in the openings at each end of the bobbin and each being provided at its inner end with a head disposed behind the inner face of its associated plate, and a hollow tubular element within the Number barrel having its ends in engagement with the headset the gudgeons and holding said heads in abutment with the inner faces of the plates.

W'ILLIAlVL H. MILLER.

REFERENCES CITED The following references are of record in the f le of this patent:

UNITED SIA'IfES- PATEN'I'S Date 

